List of county routes in Somerset County, New Jersey

Signage for CR 621 (Elizabeth Street) southbound past CR 623 (Canal Road) in South Bound Brook
CR 621 (Elizabeth Street) southbound past CR 623 (Canal Road) in South Bound Brook
Example of signage along county routes in Somerset County, at the junction of CR 518 and CR 605 in Rocky Hill

The following is a list of county routes in Somerset County in the U.S. state of New Jersey. For more information on the county route system in New Jersey as a whole, including its history, see County routes in New Jersey.